Safety elevator-cage.



C. 'H= STURGIS.

SAFETY ELEVATOR CAG-E.

A1 1 LI0ATI0N FILED JUNE 27, 190e.

ATTORNEYS THE NoRRls PETERS co., yvAsHmaroN. mc.

o. H. sTURGIs.

SAFETY ELEVATOR GAGE. APPLICATION ILED JUNE 27, 1908.

914,086. Y. Patented Mar. 2, 1909. s :xmms-SHEET n.'

Wig- E- NVENTOH A 7TOHNE YS O. H. STURGIS.

SAFETY ELBVATOR GAGE.

APPLICATION FILBDI'JUNB 27, 190B.

rmrrnn Tatra n ren.

CHARLES II. STURGIS, OF GRANVILLE, ILLINOIS, ASSIGNOR OF ONE-HALF TO IRVING N.

y COLBY, OF GRANVILLE, ILLINOIS.

SAFETY ELEVATOR-CAGE.

Application filed .T une 27, 1908.

To all whom it 'may concern:

Be it known that I, OrmnLns II. STURcIs, a citizen of the United States, and a resident of Granville, in the county of Putnam and State of Illinois, have invented a new and Improved Safety Elevator-Cage, of which the following is a full, clear, and exact description.

My invention relates to elevators and it is my object to provide safety appliances therefor, which I construct in the following manner: The elevator cage is provided with dogs at its bottom, which are adapted to be thrown into engagement with hooks hung in sets to swing in channel irons in the elevator shaft, a stud being provided in connection with the cage, the stud being adapted to actuate means which are adapted to throw the dogs into engagement with the hooks, over which it is adapted to slide during the upward movement of the cage, the dogs being so disposed as to lock with one set of the hooks, should the cage start downwardly. At the upper part of the shaft there is a trip which actuates the mechanism which is` adapted to throw the dogs inwardly and free from the hooks, notched rods being pivoted to the dogs, the notches in the rods engaging a member which is adapted to hold the dogs away from the hooks swung in the shaft; there also being means which are adapted to hold the dogs yieldingly extended, and which are also adapted to free the notched rod -from the member to permit the dogs to engage the hooks, should the cable break.

In this specification I will describe the preferred form of my invention, but it will be understood that I do not limit myself thereto, as I consider myself entitled to all forms and embodiments of the invention which may be held to fall within the scope of the appended claims.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the iigures, in which- Figure 1 is a sectional elevation on the line 1 1 of Fig. 2; Fig. 2 is a side elevation, one side of the shaft timbers being removed- Fig. 3 is a fragmentary view, partly in sec; tion, showing a portion of the elevator shaft and the bottom of the elevator cage with the Speccation of Letters Patent.

Patented March 2, 1909. I

Serial No. 440,623.

mechanism adjusted thereto, the dogs being in the position which they assume when the cage ascends, Fig. 4 is an inverted plan View on the line 4-4 of Fig. 3; Fig. 5 is a View similar to that shown in Fig. 3, but with the dogs in the position which they assume when the cage descends; and Fig. 6 is an enlarged fragmentary view showing the mechanism which is disposed at the bottom of the elevator cage.

By referring to the drawings, it will be seen that the elevator shaft may have two or more perpendicular timbers 1, to each of which is secured a channel iron 2, the opening therein being disposed inwardly toward the elevator cage 3. In these channel irons are hung hooks 4, the free terminals of which are normally extended beyond the channel iron, the channel iron being deep enough to permit the hooks to swing baclrwardly so that the terminals will not prevent the movement of the cage 3 in the shaft when the dogs 5 are withdrawn from the channel irons 2. At the bottom of the cage are pivoted at either side, the dogs 5 which are adapted to engage the hooks 4 when the dogs are extended by the rods 6 which are pivoted thereto. These rods 6 extend through openings in a U-shaped member 7, there being stops 8 secured to the rods 6, the stop 8 on the terminal of the rod 6 being adapted to prevent the rod 6 from passing through the member 7, and the stop 8 between the U-shaped member 7 and the dog 5 being adapted in connection with a member 9, on the U-shaped member', to form surfaces against which a spring 10 may press, the springs 10 being adapted to normally hold the dogs 5 extended so that they will engage the hooks 4.

In the lower surface of the rods 6 there are notches 11 which are adapted to engage the member 7 at the opening therein, it being understood that when the dogs 5 are thrown inwardly out of engagement with the hooks 4, the rods 6 will be so disposed that the notches 11 therein will engage the surfaces of the U-shaped member 7. Passing perpendicular-ly through an opening in the bottom of the U-shaped member 7 and between its sides, is a stud 12, the stud 12 extending upwardly through the frame 13, to which the U-shaped member 7 is secured,

there being a pin 14 inserted through the rod 12, the pin normally resting on the bottom of the U-shaped member 7', and which is adapted to prevent the stud 12 from becoming misplaced, and to release the rods 6 from the member 7. The stud 12 is so disposed as to pass between the rods 6, and immediately thereover it has disposed thereon a member 15 between which and the frame member 13 is disposed a spring 16, the spring 16 being adapted to press the member 15 down on the rods 6.

Through an opening in the upper portion of the stud 12 is extended a terminal of an arm 17, this arm 17 being secured to a rocker shaft 18, j ournaled in the lower part of the frame of the cage, this rocker shaft 18 having a crank 19, there being a lever 20 which is fulcrumed at the top of the cage, this lever 20 having an arm 21, the crank 19 and arm 21 being connected bya link 22. Another arm 23 of the lever 21 extends upwardly and is secured to the cable 24 by a chain 25 or by any other suitable means. A spring 26 is connected to the arm 23 of the lever 2O and to the top of the elevator cage, this spring 26 being adapted to draw the arm 23 of the lever 20 downwardly, should the cage descend downwardly without the normal sustaining power of the cable 24.

At the top of the shaft are trips 27 which are disposed in the path of the dogs 5 and which are adapted to press them inwardly so that the notches in the rods 6 will be disposed over the edges of the U-shaped member 7, whereupon the pressure of the member 15 on the rods 6 will cause the notches to lock with the said member 7, thus holding the dogs 5 away from the hooks 4. It will therefore be seen that when the cage descends, the dogs 5 are held out of engagement with the hooks 4, and the cage will be unobstructed in its descent. But, should the cable 24 break or should it become slack, the arm 23 of the lever 2O will be thrown downwardly by the spring 26, which will press the link 22 downwardly and rock the shaft 18 so that the terminal of the arm 17 will be thrown upwardly and will draw the stud 12 upwardly therewith, the member 15 being withdrawn from engagement with the rods 6 and the pin 14 thrown against the lower surfaces of the said rods. This will cause the rods 6 to be freed from the member 7, and the springs 10 will force the rods outwardly, carrying with them the dogs 5, which will be so thrown as to be disposed in the path of the hooks 4. When the cage reaches the bottom of the shaft, the stud 12 will be thrown upwardly by contact with a surface 28 at the bottom of the shaft, and this will remove the member 15 from the top of the rods 6 and will also throw the pin 14 against the lower surface of the said rods, Which will unlock the rods from the U-shaped member 7 and will permit the springs 10 to throw the dogs 5 out, so that the dogs will engage the hooks 4 should the cable break as the elevator ascends. The hooks as will be seen, are so formed and disposed that when the elevator ascends with the dogs 5 thrown outwardly, they will push the hooks inwardly without impeding the movement of the cage upwardly, but should the cable at any time break, the cage will be immediately caugnt by the hooks immediately below the dogs, as the dogs are in a position to engage and lock with the hooks immediately, should the cage descend,

Beveled members 29 are provided, which are secured at the top of the cage and are adapted to push inwardly the hooks 4 as the cage ascends. Guides 30 are also secured to the cage, the guides having a sliding engagement with the channel irons 2.

lt will be understood 'that when the cage is ascending it will be caught by the hooks 4 on the breakage of the cable independently of the mechanism connected with the cable to operate the dogs.

Having thus described my invention, l claim as new and desire to secure by Letters Patent:

1. In a safety elevator, a shaft, a cage, a cable therefor, an adjustable dog which is adapted to connect the cage with the shaft, means which are adapted to throw the dog into an inoperative position at a predetermined elevation of the cagepin the shaft, means which are adapted to throwthe doginto an operative position at a predetermined elevation of the cage in the shaft, and means to throw the dog into an operative' position when the cage descends unsupported by the cable. Y

2. In a safetyelevator, a shaft, a cage, a cableA therefor, a dog adjustably secured to the cage, means which are adapted to throw the dog inwardly at a predetermined elevation of the cage in the shaft, and means to throw the dog outwardly when the cage descends unsupported by the cable.

3. In a safety elevator, a shaft, a cage, a dog adjustably secured to the cage, hooks pivoted to swing in the shaft, the hooks being disposed in the path of the dogs, Vand means adapted to operate the dogs so that they will assume predetermined positions with reference to the hooks when the cage is at a predetermined elevation in the shaft.

4. In a safety elevator, a shaft, a cage, means secured to the cage which are adapted to engage means in the shaft, means in the shaft which are adapted to be engaged by the means on the cage, means which are adapted to keep one of the said means eX- tended so. that they will engage the other means when the cage is operated, means to lock the extended means out of engagement with the other means, and means to with* sienes eaige, adooks pn@ ed to be engaged by the said adjustable dogs on th cage, means for keeping;` the adjustable i k extended so that they will engage tlie h when the cage 1s operated, means for le 'the ad justable dogs ont of engagement .i it the hooks, and means for releasing the at i justable dogs at a predetermined elevation n l the travel of the cage in the shaft.

6. In a safety elevator', a shaft, a sage,

means secured to the cage which are ade to engage means in the shaft, means n shaft `which are ada pted to be engz'tged by the said meas on the oag'e, met` is which are adapted to keep one of the said means yieidingly extended so that they will engage the other means when the cage is operated, means which are adapted to leek the yieldingly extended means ont of engagement 1 with the other means, means which are adapted to Withdraw the fieldingly extended means from engagement with the other means at predetermined elevation in the travel of the cage in the shaft, and ineans which are adapted to release the means at a predetermined elevation travel of the cage in the shaft.

7. 1n a safety elevator, a shaft, a eab-ie, a Cage, hooks swung in the shaft, dogs on the in the cage adapted for ongagnw the hooks in the i shaft, means Awhioh are adapted for keeping the dogs yieldingly extended so that they Will engage the hooks When the Cage is operated, means in the cage which are adapted for locking,` the yieldingly extended dogs out of engagement with the hooks, and means connected to the Gable which are ad apted for freeingr the looking means on. the breakage of the cable.

8. 1n a safety elevator, a shaft, a sage, means secured to the cago whioh are adapted to engage means in the shaft, means in the shaft which are adapted to engage the means on the cage, a member pivote/d to the means on the cage, means which are adapted to keep the means on the cage yielding-ly extended, means to look the means on the cage away from the shaft, and stud Whiel'i is adapted to unlook the said means, the said stud being adapted to be operated by contact with the bottom ofthe shaft.

9. In a safety elevator, a shaft, a cage, means secured to the Gage which are adapted to engage means in the shaft, means in the l locked l which are adapted to aotuate the rod to Withl draw the n'ieans on the nage from engagel ment with the means in the shaft at a predetermined elevation in the travel of the cage in the shaft.

l 10. 1n a safety elevator, a shaft, a Cage, means seeured to the o which ada} ted to ei "e means in the shaft, means in the si'iaft 'which are adapted to engage the means on the eago, means which are adapted to the means seonredr to the cage yieidy extended so that they will engage the i in the shaft, a rod secured to the means on the sage, a member seenred to the ease, the rod hang adapted to engage the l member, there being notohes on the rod Whioli will permit it to lock therewith, means which are adapted. to aetuate the rod at a predetermined elevation of the travel of the in the shaft so that the notches will interloek with the said member', and a stud which is adapted to unlock the rod from the saitL member.

11. 1n a safety elevator', a shaft, a Gage, means seoured te the cage Which are adapted to engage means in the shaft, means in the shaft whioh are adapted to engage the means on the cage, means which are adapted to keen the means secured to the cage yieldingly extended so that they will engage the l means in the shaft when the cage operated, a rod seoured to the means on the cage, a member seem-ed to the cage, the rod being; adapted to loer; with the said member, and means Wiioh are adapted to Withdraw the means secured to the cage out of engagement with the means in the shaft.

12. 1n a safety elevator, a shaft, a cage, means secured to the cage which are adapted to engage means in the shaft, means in the shaft adapted to be engaged by the means on the cage, means which are adapted to keen the means seeured to the cage extended so that they will engage the means in the shaft when the cage operated, a rod on the means secures to the cage, a member secured to the cage, the rod being adap ted tolockwith the said member, means which are adapted to Withdraw the means secured to the Cage o at of engagement width the means in the shaft, and means to unlock the engagement of the rod from the said member.

13. in a safety elevator, a shaft, a cage, means adjustably secured to the cage which are adapted to engage means in the shaft, means in the shaft which adapted to engage means on the cage, means Which are adapted to keep the means secured to the cage yieldingly extended so that they will engage the means in. the shaft When the cage is operated, a rod on the means secured to the cage, a member .secured to the cage, the rod being adapted to look With the said member, means whieh are adapted to Withdraw the means secured to the cage out of engagement With the means on the shaft, and a movable stud having members Which are adapted to engage With the said rod, the stud being adapted to engage-the shaft at a predetermined position so that the members secured thereto will strike the rod to free it from the locking engagement with the said member.

14. ln a safety elevator, a shaft, a cage, a support therefor, means adjustably secured to the cage which are adapted to engage means in the shaft, means in the shaft which are adapted to engage the means on the cage, means which are adapted to keep the means on thc cage extended so that they Will engage the means in the shaft when the cage is operated, a rod on the means in the cage, a member secured to the cage, the rod being adapted to lock With the said member, means Which are adapted to actuate the rod to withdraw the means secured to the cage out of engagement with the means in the shaft, means to unlock the engagement of the rod and the said member, and means which are adapted to operate the means to unlock the said engagement Which are operated by an abnormal decrease in the sustaining power of the support for the cage.

15. In a safety elevator, a shaft, a cage, a support therefor, means adjustably secured to the cage Which are adapted to engage means in the shaft, means in the shaft which are adapted to engage means on the cage, means which are adapted to keep the means on the cage yieldingly extended so that they Will engage the means in the shaft When the cage is operated, a rod on the means in the cage, a member secured to the cage, the rod being adapted to lock With the said member, and means Which are adapted to withdraw the means secured to the cage out of engagement With the means in the shaft, a movable stud having members Which are adapted to engage With the said rod, the stud being adapted to engage the shaft at a predetermined place so that the members secured thereto Will strike the rod to free it from locking engagement with the said member, and means to operate the means to unlock the said engagement Which are operable by an abnormal decrease in the sustaining power of the support for the cage.

16. In a safety elevator, a shaft, a cage, an adjustable dog on the cage, a hook pivoted in the shaft that Will permit the cage to ascend at all times but When the dog is extended Will prevent its descent, and means adapted to vary the position of the dog With reference to the cage When the cage is at predetermined elevations in the shaft.

In testimony whereof l have signed my name to this speciiication in the presence of tWo subscribing Witnesses.

CHARLES H. STURGIS.

Witnesses: Y

l/VILLIAM F. GEDING, GEORGE W. HUNT. 

